GENERAL DESCRIPTION

The baseband CODEC is a complete interface circuit between the RF part in a mobile communication handset and the Digital Signal Processor (DSP).

FEATURES

• Low power and low voltage device in 0.25 micron CMOS technology; supply voltage: analog 2.7 V (typical) and digital 1.5 V (typical)

• Compatible with GSM phase 2 and DCS1800 recommendations

• Complete in-phase and quadrature component interface paths between the Digital Signal Processor (DSP) and RF circuitry

• Complete linear PCM CODEC for audio signal conversion between earphone/microphone and DSP

• Four auxiliary analog inputs for measurement purposes (e.g. battery monitoring)

• Three auxiliary analog outputs for control purposes (i.e. AFC, AGC and power ramping control)

• Separate baseband, audio and control serial interfaces

• Voice band Signal Processor (VSP) for flexible audio data processing.

APPLICATIONS

The CMOS integrated circuit PCF50732, Baseband and audio interface for GSM, is dedicated to wireless telephone handsets conforming to the GSM recommendations phases 1 and 2, DCS1800 and PCS1900.